loginpress / include / class-loginpress-theme-template.php

class-loginpress-theme-template.php in LoginPress | wp-login Custom Login Page Customizer 3.0.2, at include/class-loginpress-theme-template.php

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1	<?php
2	/**
3	* LoginPress template functions.
4	*
5	* @since 1.1.3
6	*/
7
8	// Exit if accessed directly.
9	if ( ! defined( 'ABSPATH' ) ) {
10	exit;
11	}
12
13	if ( ! class_exists( 'LoginPress_Theme_Template' ) ) :
14
15	/**
16	* Add LoginPress Templates to to use in the theme.
17	*/
18	class LoginPress_Theme_Template {
19
20	/**
21	* A reference to an instance of this class.
22	* @var string
23	*/
24	private static $instance;
25
26	/**
27	* The array of templates that this plugin tracks.
28	* @var string
29	*/
30	protected $templates;
31
32	/**
33	* Returns an instance of this class.
34	*/
35	public static function get_instance() {
36
37	if ( null === self::$instance ) {
38	self::$instance = new LoginPress_Theme_Template();
39	}
40
41	return self::$instance;
42	}
43
44	/**
45	* Initializes the plugin by setting filters and administration functions.
46	*/
47	private function __construct() {
48
49	$this->templates = array();
50
51	// Add a filter to the attributes metabox to inject template into the cache.
52	if ( version_compare( floatval( get_bloginfo( 'version' ) ), '4.7', '<' ) ) {
53	// 4.6 and older
54	add_filter( 'page_attributes_dropdown_pages_args', array( $this, 'register_project_templates' ) );
55	} else {
56	// Add a filter to the wp 4.7 version attributes metabox
57	add_filter( 'theme_page_templates', array( $this, 'add_new_template' ) );
58	}
59
60	// Add a filter to the save post to inject out template into the page cache.
61	add_filter( 'wp_insert_post_data', array( $this, 'register_project_templates' ) );
62
63	// Add a filter to the template include to determine if the page has our template assigned and return it's path.
64	add_filter( 'template_include', array( $this, 'view_project_template') );
65
66	// Add templates.
67	$this->templates = array(
68	'template-loginpress.php' => 'LoginPress',
69	);
70
71	}
72
73	/**
74	* Adds our template to the page dropdown for v4.7+
75	*
76	*/
77	public function add_new_template( $posts_templates ) {
78
79	$posts_templates = array_merge( $posts_templates, $this->templates );
80	return $posts_templates;
81	}
82
83	/**
84	* Adds our template to the pages cache in order to trick WordPress
85	* into thinking the template file exists where it doesn't really exist.
86	*/
87	public function register_project_templates( $atts ) {
88
89	// Create the key used for the themes cache.
90	$cache_key = 'page_templates-' . md5( get_theme_root() . '/' . get_stylesheet() );
91
92	// Retrieve the cache list.
93	// If it doesn't exist, or it's empty prepare an array.
94	$templates = wp_get_theme()->get_page_templates();
95	if ( empty( $templates ) ) {
96	$templates = array();
97	}
98
99	// New cache, therefore remove the old one
100	wp_cache_delete( $cache_key , 'themes');
101
102	// Now add our template to the list of templates by merging our templates
103	// with the existing templates array from the cache.
104	$templates = array_merge( $templates, $this->templates );
105
106	// Add the modified cache to allow WordPress to pick it up for listing
107	// available templates
108	wp_cache_add( $cache_key, $templates, 'themes', 1800 );
109
110	return $atts;
111
112	}
113
114	/**
115	* Checks if the template is assigned to the page.
116	*/
117	public function view_project_template( $template ) {
118
119	// Get global post
120	global $post;
121
122	// Return template if post is empty
123	if ( ! $post ) {
124	return $template;
125	}
126
127	// Return default template if we don't have a custom one defined
128	if ( ! isset( $this->templates[ get_post_meta( $post->ID, '_wp_page_template', true ) ] ) ) {
129	return $template;
130	}
131
132	$file = plugin_dir_path( __FILE__ ). get_post_meta( $post->ID, '_wp_page_template', true );
133
134	// Just to be safe, we check if the file exist first
135	if ( file_exists( $file ) ) {
136	return $file;
137	} else {
138	echo $file;
139	}
140
141	// Return template
142	return $template;
143
144	}
145	}
146	endif;
147	add_action( 'plugins_loaded', array( 'LoginPress_Theme_Template', 'get_instance' ) );
148